Update #3: Corrected the start ( to 1600 UTC) and end time (to 1830 UTC) for the NDE System Upgrade on October 18, 2022.

Update #2: Please note: The NDE System Upgrade has been postponed to October 18, 2022. 

Date/Time of Initial Impact: October 18, 2022, 16:00Z UTC

Date/Time of Expected End: October 18, 2022, 18:30Z UTC

Update #1:  Please note: The NDE System Upgrade has been rescheduled on October 13, 2022. The JPSS Risk Reduction (JRR) v3.2, Surface Reflectance (SR), Vegetation Health Product (VHP),  Vegetation Index (VI), Land Surface Temperature (LST), Land Surface Albedo (LSA), Offline LSA/ Land Surface Emissivity (LSE), Gridded LST/LSA and Green Vegetation Fraction (GVF) have been REMOVED from the NDE release 2.0.33. 

Topic: NDE System Upgrade 

Date/Time Issued: October 11, 2022 1933 UTC

Product(s) or Data Impacted:  All NDE products

Date/Time of Initial Impact: October 18, 2022 14:50Z UTC

Date/Time of Expected End: October 18, 2022 17:20Z UTC

Length of Outage: 2.5 hours 

Details/Specifics of Change:

The October 18, 2022 installation of NDE release 2.0.33 is planned to occur during back orbits. NDE will not be ingesting, processing or distributing data during installation. No data loss is expected, but there will be a possible backlog of processing when installation is complete.

New/Updated products included in this release are:

Operational Updates of S-NPP/NOAA20/NOAA21 JPSS Rick Reduction (JRR) v3.2 on NDE

Impact on users: Yes

File names have changed to:

List of Scientific Changes:

•        Cloud Mask:    New snow modification routine. New cloud mask mode added. 

Updated to mode 2 with new LUTs and code logic.

•        Cloud Phase:   New cloud phase science version.

•        Cloud Height:  Update for opaque cloud temperatures. Science update to improve  matrix and convergence calculations by using kdtree machine learning.

•        DCOMP:   Science code update for visible reflectance and thick clouds. Added snow modification routine. New NOAA-21 LUTs. Added a new Nighttime Lunar COMP module to calculate microphysical properties during nighttime granules and when lunar reflectances are valid (moon is shining over the surface). Changed max solar zenith from 75 to 82.

•        Cloud Base: Science update to improve nighttime arctic retrievals.

•        New Product:  Cloud Cover Layers:   Added Cloud Base as a dependency. Added DQF.

Added capability for Convective Cloud Probability & Supercooled Water at 5 flight layers. The PDA short name is JRR_CloudCoverLayers.

•        ADP:    Science update and minor bug fix. Added J2 support, updated coefficients in algorithm configuration. Added fix required because of changes to the cloud mask packed flag.

•        AOD:   Science update. Fixed initialization and pointers. Changed to use 17 classes of Surface Type rather than 14 class Surface Type.

•        Ice Concentration:   Created a reader and interpolated the 10km input data (on EASE-2 grid) to satellite grid.  Used to screen out regions of low ice concentration at night.

•        Ice Age:   Science update. Added check for solar zenith angle between 85 and 93 degrees

•        Snow Cover:  The stripping in NOAA-20 VIIRS Snow product has been properly indicated in the QCs

CrIS BUFR Products: The cloud information included in the CrIS BUFR products will reflect the JPSS Risk Reduction (JRR) updates.

VIIRS Polar Winds: The polar winds products will reflect the JRR updates.

Operational Updates of S-NPP and NOAA20 MIRS v11.8 on NDE

Impact on users: Yes

File names have changed to:

List of Scientific Changes:

1) Added J02 (NOAA-21) processing capability in preparation for JPSS-2 launch.

2) Updates to the snowfall rate (SFR) algorithm software including

●     final version is ready for J02 processing

●     machine learning based snowfall detection algorithms for SNPP and NOAA-20

●     new radiometric bias corrections for SNPP and NOAA-20

●     cloud temperature initialization for SNPP and NOAA-20

●     machine learning based ice water path initialization for SNPP and NOAA-20 over CONUS

●    machine learning based SFR bias correction for SNPP and NOAA-20 over CONUS

3) Integration of an additional option for the radiometric bias correction for S-NPP and NOAA-20. The new option is a dynamic bias correction which uses a machine learning approach to compute a unique bias correction for each individual scene based on its radiometric and geophysical characteristics. The default option remains as before, the use of a static bias correction. Selection of the bias correction option is determined in the static tuning files located under data/StaticData/TuningData. Separate tuning files with flags set to use the machine learning correction are contained in the package and can be used by simply modifying the PCF to point to these files. (Note: prior to recommending this option for operations, the science team will brief stakeholders at a future date on comparative results to make sure there is consensus on switching to the new option).

4) Added one new parameter ‘char quality_information’

5) Added one new attribute ‘ascend_descend_data_flag ’ in the global metadata

6) Made the global attributes better compliance with NDE guidelines and CF conventions

Operational Update of S-NPP OMPS LP on NDE:

Impact on users: Yes

File names have changed to: 

List of Scientific Changes:

Delivery (v2.51) for OMPS LP (SNPP) updates some of the climatological tables used in the retrieval algorithm and sets the processing to all three slits instead of just the middle one.

Operational Update of S-NPP/NOAA-20/NOAA-21 Surface Reflectance (SR)  on NDE:

Impact on users: Yes

File names have changed to:

List of Scientific Changes:

Allow VIIRS Surface Reflectance to handle data from the J02 satellite. It also acts as a maintenance delivery for NPP and N20. Follow any standards used for last delivery (v1r2): overall flow, production rules, etc. have not changed, only for enhancement/maintenance DAP.

Operational Update of S-NPP/NOAA-20/NOAA-21 Vegetation Health Product (VHP)  on NDE:

Impact on users: Yes

File names have changed to: